Heating-furnace



(No Model.) 2 sheets-snot 1.

. G. R. BROWN.

HEATING FURNACE.

No. 247,299. Patented Sept-20, 18 81.

2 Sheets-Sheet 2.

(No Model.)

G. 3. BROWN.

HEATING FURNACE.

No. 247,299. Patented Sept. 20,1881.

.1 eek en .0

MW/dd/ m" PATENT OFFICE.

GEORGE R. BROWN, OF OORNING, NEWV YORK.

HEATING-FURNACE.

SPECIFICATION formingpart of Letters Patent No. 247,299, dated September 20, 18 1.

Application filed June 20, 1881. (No model.)

To all whom it may concern:

Be it known that I, GEORGE Ransom BROWN, a citizen of the United States, residing atOorning, county of Steuben, State of New York, have invented new and useful Improvements in Heating Furnaces and Stoves, of which the following is a specification.

My invention relates to improvements in air-heating furnaces or stoves, in which the feedmay be at the top-by magazine or at the side by a door.

In myimproved furnace the products of combustion are directed from the combustionchamber into a narrow flue partially surrounding the fire-pot and arranged between it and the outer casing or hot-air drum, and forming an auxiliary radiator. The cold air is caused to enter the hot-air inclosiug-case over this auxiliary radiator by a diving-flue opening into said case at or near the base of the fire-pot and between it and the auxiliary radiator, whereby the cold air is heated in its ascendin g and diving course over the vertical walls of the auxiliary radiator, and delivered into the hot-air casein contact ,with' and around the base of the fire-pot, thus utilizing the escaping heat to heat the cold air at the point of its entrance at the base of the furnace, and preventing the waste of radiant heat from the fire-pot. The return-flue introduces the air to be heated into the air-heating case from a point at or above the fire-pot and over the top of the auxiliary radiator, so that the air is very considerably heated by the escaping products of combustion before it enters the heating-case or is brought into contact with the primary heating-surfaces, thus greatly increasing the heating capacity of the furnace. The provision for a magazine-feed at the top of the furnace gives important advantages, and lessens the expense of the furnace. Provision is I also made for the escape of the gases from the magazine into the combustion-chamber. This is important, as otherwise the magazine would hold the gases, and thus render its use objec tionable in their esoapein supplying the magazine.

Referring tothe accompanying drawings, Figure 1 represents a vertical section of an air-heating furnace embracing my invention; Fig. 2, a similar section taken through the smoke-pipe of the combustion-chamber; Fig. 3, a similar section taken through the side-door outer walls.

opening; Fig. 4, a horizontal section taken on the line a mot Fig. 2, and Fig. 5 a similar section taken on the line 3 y of Fig. 3.

The fire-pot is of cast-iron, and of any suitable construction, and its walls are extended to form the ash-chamber.

A sheet-metal radiator, a, surmounting the fire-pot, has a cast-iron cover, I), and forms the combustion chamber.

A casing or drum, preferably of galvanized iron, inoloses the furnace proper, and forms the hotair chamber 0, with the upper portion of which the usual hot-air flue connections, d, are made.

A cast-iron magazine, 6, having a top teed,

extends through the top of the inclosing-casing, through the top plate of the radiator a, and terminates in a proper relation to the firepot.

The cold air enters the space f, surrounding the ash-chamber, but it has no direct contact with the walls of the fire-pot, or entrance into the hot-air chamber, by reason of the intervention of a base-plate, 9, extending horizontally from the fire-pot to near the walls of the inclosing-case.

An auxiliary radiator, h. of sheet metal capped with cast-iron,is suitably fitted and supported upon the base-plate g at or near its outer edge, and, rising therefrom to or above the top of the tire-pot, forms a narrow flue, '5, which, connecting at its top with the smokepipej of the combustion chamber, extends partially around the fire-pot and connects with an exit smoke-pipe, k, risingfrom its top. Through this flue t the products of combustion escape, and by reason of the narrowness of said flue, the heat is radiated alike from its top and from its bottom and from its inner and from its This auxiliary radiator is separated from the inelosing-case, and forms an ascending cold-air flue, l, which, extending over the top of said radiator, enters a diving-flue, m, formed between the said radiator and the firepot by means of a sheet-metal casing, a, overhanging or depending from a cast-iron cap, a, which joins the inner wall of the inelosingcase. The inner casing, a, does not extend to the base-plate 9, but terminates above it, so as to bring the outlet of the diving-flue in position to deliver the air to be heated against the walls of the fire-pot and against the walls of the primary radiator into the air-heating chamher. The cold air is thus heated by the escaping products of combustion beforein enters the heating-chamber proper. The casin g n a partially incloses the auxiliary radiator, and is suitably supported upon the base 9, or by brackets upon the top of the fire-pot, or by brackets from the inclosing-casing, or from the walls of the auxiliary radiator.

The entrance and the exit connectionsh and 7&2 of the auxiliary radiator hare preferably enlarged at their junction with said radiator-flue i, to allow the products of combustion to pass freely from the combustion-chamber into said flue, and from it into the exit-pipe, the sum of the area of said flue connections being about equal to that of said flue, to cause the heat to pass to the bottom of the flue and to escape therefrom.

Olean-out openings 1" r are formed at the bottom of the entrance and exit connections of the auxiliary radiators and open at the side of the inclosing-case.

To prevent gases from accumulating in the magazine it is provided with perforations 8, opening into the combustion-chamber at or near its top, and into which the gases pass from the magazine, so that the latter can be fed without the objection of escaping gases.

A suitable incased opening, o, for kindling the fire and other purposes, extends from the inclosing-case into the combustion-chamber in the space between the vertical entrance and exit connections with the auxiliary radiator; and beneath it is an opening, to, through which to insert a vessel or pan for water upon the base-plate g within the air-heating chamber, within which the water evaporates, for a purpose Well understood. The openings in the inclosing-case are provided with suitable doors.

I may provide for feeding the furnace by a side door instead of at the top of the magazine; but in either case the provision for the escape of the gases from the magazine is im portant.

The skirt of the inner casing is cut out where it crosses the ineased openingo, and the smokepipe from the combustion-chamber passes through the top of said overhanging casing.

The height of the furnace will be such as not to render it inconvenient to supply the magazine at the top, and any suitable cover may be used for the magazine.

I claim- 1. The combination, in an air-heater, of the fire-pot, the base-plate g, the inner radiator, a, and the auxiliary radiator h, with the overhanging casing. or depending skirt 4?, and the inclosing case, whereby an ascending and a diving flue are formed for directing the cold air upward over and down ward in contact with the walls of said auxiliary radiator, and deliveringit within the heating-chamber 0 around the fire-pot, substantially as described.

2. In an air-heater, the auxiliary radiator h, forming a narrow flue, i7, around the fire-pot, connected with the combustion-chamber, supported upon the base 9 of said fire pot, separated from the inclosing case, and combined with a partially-inclosing overhanging inner casing, and the outer casing to form an ascending and diving flue over the top and walls of said radiator It, the said diving-flue opening into the air-heating chamber above the said fire-pot base, and arranged to deliver the air to be heated against the walls of the firepot, and of the radiator mounted thereon, substantially as described, for the purpose specified.

3. The auxiliary radiator h, forming a narrow flue, t, for the products of combustion around the fire-pot, and having enlarged entrance and exit connections h and W, with the combustion chamber and smoke pipe, in combination with a fire-pot having a bascsupporting plate, g, for said radiator, an overhanging casing and an inclosing-casc forming the cold-air ascending flue Z, opening below the fire-pot base on one side of said auxiliary radiator, and a diving-flue, m, for the air to be heated, opening into the air-heating chamber above said base-plate on the-other side of said auxiliary radiator, substantially as described, for the purpose specified.

4. In an air-heater, the inner casing or depending skirt, n, arranged to project from the inner wall of the inclosing-case, combined with the outer casing and the auxiliary radiator 12, to form an ascending flue, Z, outside of said auxiliary radiator, a top flue over said auxiliary radiator, a descending or return flue, m, at the inner side of said auxiliary radiator, and an ascending flue between said depending skirt and the inner radiator, a, opening into the hot-air chamber 0, substantially as described.

5. An air-heating furnace combining a primary and an auxiliary radiator, the latter partially surrounding the fire-pot and supported upon a base-plate thereof, and having enlarged inlet and exit connections, an overhanging casing and an inclosing-case, forming-an ascending and diving flue over the walls and top of said auxiliary radiator, and a magazine having a top feed and openings communicating with the combustion chamber, all constructed substantially as described, for the purpose specified.

6. The combination, in an air-heater, of the interior radiator, a, with a surrounding radiator, 71, forming a narrow flue, 6, having an enlarged connection, h, with said interior radiator and an enlarged connection, If, with the exitpipe 70, the casing, which forms the airheating chamber 0 and the air-inlet passage Z, and an overhanging casing, n n, for said narrow-flue radiator, substantially as described, for the purpose specified.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

GEORGE RANSOM. BROWN.

Witnesses:

JOHN LYNAHAN, S. M. (JoPP. 

